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https://github.com/nim-lang/Nim.git
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f0f3904ff0
* implement `ensureMove` * use an additional flag * improve some logics * progress: fixes discard ensureMove * forbids nested expressions * improve error messages * checkpoint * fixes cursor * ADD MORE TESTS * fixes cursorinference again * tiny cleanup * improve error messages * fixes docs * implement comments add more tests * fixes js
28 lines
524 B
Nim
28 lines
524 B
Nim
discard """
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errormsg: "cannot move 'x', passing 'x' to a sink parameter introduces an implicit copy"
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matrix: "--cursorinference:on; --cursorinference:off"
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"""
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block:
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type
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X = object
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s: string
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proc `=copy`(x: var X, y: X) =
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x.s = "copied " & y.s
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proc `=sink`(x: var X, y: X) =
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`=destroy`(x)
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wasMoved(x)
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x.s = "moved " & y.s
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proc consume(x: sink X) =
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discard x.s
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proc main =
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var s = "abcdefg"
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var x = X(s: ensureMove s)
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consume(ensureMove x)
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discard x
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main() |